Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO_2]/[HCl] during POLARIS
We examine inorganic chlorine (Cl_y,) partitioning in the summer lower stratosphere using in situ ER-2 aircraft observations made during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) campaign. New steady state and numerical models estimate [ClONO_2]/[HCl] using currently...
Published in: | Journal of Geophysical Research: Atmospheres |
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American Geophysical Union
2001
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Online Access: | https://authors.library.caltech.edu/46497/ https://authors.library.caltech.edu/46497/1/jgrd7993.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140625-083843890 |
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ftcaltechauth:oai:authors.library.caltech.edu:46497 2023-05-15T15:07:54+02:00 Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO_2]/[HCl] during POLARIS Voss, P. B. Stimpfle, R. M. Cohen, R. C. Hanisco, T. F. Bonne, G. P. Perkins, K. K. Lanzendorf, E. J. Anderson, J. G. Salawitch, R. J. Webster, C. R. Scott, D. C. May, R. D. Wennberg, P. O. Newman, P. A. Lait, L. R. Elkins, J. W. Bui, T. P. 2001-01-27 application/pdf https://authors.library.caltech.edu/46497/ https://authors.library.caltech.edu/46497/1/jgrd7993.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140625-083843890 en eng American Geophysical Union https://authors.library.caltech.edu/46497/1/jgrd7993.pdf Voss, P. B. and Stimpfle, R. M. and Cohen, R. C. and Hanisco, T. F. and Bonne, G. P. and Perkins, K. K. and Lanzendorf, E. J. and Anderson, J. G. and Salawitch, R. J. and Webster, C. R. and Scott, D. C. and May, R. D. and Wennberg, P. O. and Newman, P. A. and Lait, L. R. and Elkins, J. W. and Bui, T. P. (2001) Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO_2]/[HCl] during POLARIS. Journal of Geophysical Research D, 106 (D2). pp. 1713-1732. ISSN 0148-0227. doi:10.1029/2000JD900494. https://resolver.caltech.edu/CaltechAUTHORS:20140625-083843890 <https://resolver.caltech.edu/CaltechAUTHORS:20140625-083843890> other Article PeerReviewed 2001 ftcaltechauth https://doi.org/10.1029/2000JD900494 2021-11-11T18:58:17Z We examine inorganic chlorine (Cl_y,) partitioning in the summer lower stratosphere using in situ ER-2 aircraft observations made during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) campaign. New steady state and numerical models estimate [ClONO_2]/[HCl] using currently accepted photochemistry. These models are tightly constrained by observations with OH (parameterized as a function of solar zenith angle) substituting for modeled HO_2 chemistry. We find that inorganic chlorine photochemistry alone overestimates observed [ClONO_2]/[HCl] by approximately 55–60% at mid and high latitudes. On the basis of POLARIS studies of the inorganic chlorine budget, [ClO]/[ClONO_2], and an intercomparison with balloon observations, the most direct explanation for the model-measurement discrepancy in Cl_y, partitioning is an error in the reactions, rate constants, and measured species concentrations linking HCl and ClO (simulated [ClO]/[HCl] too high) in combination with a possible systematic error in the ER-2 ClONO_2 measurement (too low). The high precision of our simulation (±15% 1σ for [ClONO_2]/[HCl], which is compared with observations) increases confidence in the observations, photolysis calculations, and laboratory rate constants. These results, along with other findings, should lead to improvements in both the accuracy and precision of stratospheric photochemical models. Article in Journal/Newspaper Arctic Caltech Authors (California Institute of Technology) Arctic Journal of Geophysical Research: Atmospheres 106 D2 1713 1732 |
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Open Polar |
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Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
We examine inorganic chlorine (Cl_y,) partitioning in the summer lower stratosphere using in situ ER-2 aircraft observations made during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) campaign. New steady state and numerical models estimate [ClONO_2]/[HCl] using currently accepted photochemistry. These models are tightly constrained by observations with OH (parameterized as a function of solar zenith angle) substituting for modeled HO_2 chemistry. We find that inorganic chlorine photochemistry alone overestimates observed [ClONO_2]/[HCl] by approximately 55–60% at mid and high latitudes. On the basis of POLARIS studies of the inorganic chlorine budget, [ClO]/[ClONO_2], and an intercomparison with balloon observations, the most direct explanation for the model-measurement discrepancy in Cl_y, partitioning is an error in the reactions, rate constants, and measured species concentrations linking HCl and ClO (simulated [ClO]/[HCl] too high) in combination with a possible systematic error in the ER-2 ClONO_2 measurement (too low). The high precision of our simulation (±15% 1σ for [ClONO_2]/[HCl], which is compared with observations) increases confidence in the observations, photolysis calculations, and laboratory rate constants. These results, along with other findings, should lead to improvements in both the accuracy and precision of stratospheric photochemical models. |
format |
Article in Journal/Newspaper |
author |
Voss, P. B. Stimpfle, R. M. Cohen, R. C. Hanisco, T. F. Bonne, G. P. Perkins, K. K. Lanzendorf, E. J. Anderson, J. G. Salawitch, R. J. Webster, C. R. Scott, D. C. May, R. D. Wennberg, P. O. Newman, P. A. Lait, L. R. Elkins, J. W. Bui, T. P. |
spellingShingle |
Voss, P. B. Stimpfle, R. M. Cohen, R. C. Hanisco, T. F. Bonne, G. P. Perkins, K. K. Lanzendorf, E. J. Anderson, J. G. Salawitch, R. J. Webster, C. R. Scott, D. C. May, R. D. Wennberg, P. O. Newman, P. A. Lait, L. R. Elkins, J. W. Bui, T. P. Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO_2]/[HCl] during POLARIS |
author_facet |
Voss, P. B. Stimpfle, R. M. Cohen, R. C. Hanisco, T. F. Bonne, G. P. Perkins, K. K. Lanzendorf, E. J. Anderson, J. G. Salawitch, R. J. Webster, C. R. Scott, D. C. May, R. D. Wennberg, P. O. Newman, P. A. Lait, L. R. Elkins, J. W. Bui, T. P. |
author_sort |
Voss, P. B. |
title |
Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO_2]/[HCl] during POLARIS |
title_short |
Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO_2]/[HCl] during POLARIS |
title_full |
Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO_2]/[HCl] during POLARIS |
title_fullStr |
Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO_2]/[HCl] during POLARIS |
title_full_unstemmed |
Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO_2]/[HCl] during POLARIS |
title_sort |
inorganic chlorine partitioning in the summer lower stratosphere: modeled and measured [clono_2]/[hcl] during polaris |
publisher |
American Geophysical Union |
publishDate |
2001 |
url |
https://authors.library.caltech.edu/46497/ https://authors.library.caltech.edu/46497/1/jgrd7993.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140625-083843890 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://authors.library.caltech.edu/46497/1/jgrd7993.pdf Voss, P. B. and Stimpfle, R. M. and Cohen, R. C. and Hanisco, T. F. and Bonne, G. P. and Perkins, K. K. and Lanzendorf, E. J. and Anderson, J. G. and Salawitch, R. J. and Webster, C. R. and Scott, D. C. and May, R. D. and Wennberg, P. O. and Newman, P. A. and Lait, L. R. and Elkins, J. W. and Bui, T. P. (2001) Inorganic chlorine partitioning in the summer lower stratosphere: Modeled and measured [ClONO_2]/[HCl] during POLARIS. Journal of Geophysical Research D, 106 (D2). pp. 1713-1732. ISSN 0148-0227. doi:10.1029/2000JD900494. https://resolver.caltech.edu/CaltechAUTHORS:20140625-083843890 <https://resolver.caltech.edu/CaltechAUTHORS:20140625-083843890> |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2000JD900494 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
106 |
container_issue |
D2 |
container_start_page |
1713 |
op_container_end_page |
1732 |
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1766339336425439232 |